Lock



R. L. HOLTON LOCK Original Filed June 13, 1927 2 Sheets-Sheet l gwoewto'o Nov. 22, 1932.

R L. HOLTON LOCK Original Filed June 13 1927 2 Sheets-Shes; 2

gwwmtoz Patented Nov. 22, 1932 PATENT OFFICE RALPH L. BOLTON, F DAYTON, OHIO LOCK Refiled for abandoned application Serial No. 198,468, filed June 13, 1927. This application filed May 14, 1931. Serial No. 537,375.

This invention which was described in abandoned application Serial No. 198,468, which discloses similar subject matter, relates to a lock for use on doors and has for an object to produce a lock, in which there is but a single bolt which is controlled either by the door knobs or by the key.

A further object is to produce a lock in which improved mechanism is employed for placing one or both of the door knobs in control of the bolt, which mechanism is latch controlled without a key for the locking operation and which in the unlocking operation may be either key or pin controlled, depending upon the side of the door from which the operation is made.

Fig. 1 shows a mortise type of lock embodying my invention.

Fig. 2 shows a face type of lock embodying my invention.

Fig. 3 is an interior view of a type of lock embodying my invention.

Figs. 4 and 5 are similar views to Fig. 3, but showing the parts of the lock in diiferent positions from that shown in Fig. 3.

Fig. 6 is a transverse sectional view taken on the line 6-6 of Fig. 3.

Fig. 7 is a somewhat enlarged sectional view taken on the line 7-7 of Fig. 3.

Fig. 8 shows a key for unlocking either type of locks embodying my invention.

Fig. 9 is a transverse sectional view taken on the line 9-9 of Fig. 3.

The lock I have shown is provided with a .3 frame 8 upon and within which the other parts are mounted. A single bolt 9 extends from the front to the rear of the lock and is so shaped that it slides upon a pin 10 located in a slot 11 formed therein, a spring 12 normally holding the bolt in extended position as shown in Fig. 5. Pivoted to this bolt at its rear and on a pin 15 are two rack members 13 and 14, one of each being located on each side of the bolt. These rack members are pro-' & vided with springs 16 and 17 which bear respectively upon the members to hold them down with their teeth in engagement with the teeth of a pair of gears 18 and 19. These gears are carried by the respective ,5 shafts 20 and 21 of a pair of door knobs, one

of which .23 is shown in Figs. 1 and 2. Thus because of springs 16 and 17 holding the rack teeth in engagement with the gear teeth, it is obvious that either of the knobs may be used to move the bolt 9 back against the tension of spring 12 and thus open the door.

However it is not always desirable that the door knobs be so employed for moving the bolt 9. Particularly is this true of the knob located on the outside of the door inasmuch as the freeing of this knob will prevent the person on the outside from opening the door and coming in. To accomplish this result I provide one of the rack members 13 or 14 ,so that the teeth of its cooperating gear is freed, thus allowing the knob to be rotated without causing movement of the bolt. In Fig. 3 I have shown the idea of releasing one of the knobs and in Fig. 4 I have shown how it is possible to releasethe other knob instead of the one which was released as in Fig. 3. The knob released in Fig. 3 is that attached to the shaft 20 of gear 18. To do this, rack member 13 is lifted. This lifting is accomplished by a lever 24 which is 7 pivoted at a point 25 and at its upper end carries a roller 26 for bearing against the under surface of the member 13 when the lever is raised as shown in dotted lines in Fig. 3. In this View the side of the lock which has been shown, is that which is toward the inside of the door, the knob on the opposite side being that which has been freed. To operate lever 24 I have provided two pins 27 and 28, which are located on opposite .8 sides of the pivot 25 and have fingers 29 and 30 respectively extending through the escutchion plate 31 of thedoor for operation of the lever 24: from the inside of the door. Assuming that the outside door knob is ren- 9 'dered inoperative as has been described,

and it is desired that the door be opened from the outside, I have provided a rotatably .mounted key socket 36 in the frame plates of the look, as shown in Figs. 1 to 5 inclusive, and in Fig. 9. Within this socket are lugs 37 at longitudinally and circumferentially spaced intervals within the hollow interior 38 ofthe socket. To be received within the socket 36 is a; key 39 which has longitudinal 1.00

slots 40 of varying length, spaced circumferentially to cooperate with lugs 37 in allowin the key to enter the socket and thereby a 0rd a means whereby the socket may be rotated. On socket 36 are two fingers 41 and 42 which straddle the pin 27 as shown in Figs. 3, 4 and 5, thereby permitting the socket to be rotated without interference therewith, and for the purpose of bringing the fingers to engage the lever 24: so that it may be tilted to release the one of the rack members which has been supported by the lever roller 26, as suggested by dotted lines in F i 5. In this manner the locked door ma unlocked by placing bolt 9 in 0011- tro of the door knob which will operate the rack member which the roller 26 has affected. A depression 33, (see Fig. 7,) in lever 24 cooperates with a ball 34 which is pressed by a spring 35 into socket or depression of the lever, thus retaining the lever in raised position until forcibly moved therefrom by either the lock key 39 or the pin 27.

Now let the reader assume a condition in which the side of the lock as viewed in Fig. 4, is the outside instead of the inside as in considering Fig. 3. Here then it is necessary to lift rack member 14 instead of member 13. For this purpose the lever 24 is reversed in its position on its pivot 25 so that its roller 26 engages only rack member 14. Then, by moving pin 28 inwardly the lever 24 is lifted and roller 26 is caused to release knob 23 on shaft 21 by disengaging the rack member 14 from the teeth of gear 19. Thus the conditions are satisfied as to locking the lock when knob 23 is the outside knob. Unlocking is accomplished in the same manner as when the opposite knob was considered to be the outside knob.

In F 5 a condition is shown which may apply to the unlocked condition of Fig. 3 as well as Fig. 4, in which the rack members are both in engagement with the gears so that either knob may operate the lock.

The form which my improved lock may take can as readily be a surface lock as shown in Fig. 2, as it is a mortise lock as shown in Fig. 1.

Having thus described my invention what I claim is:

1. A lock comprising a frame, a bolt reciprocally mounted in the frame, a toothed rack member pivoted on each side of the bolt, a separate gear meshing with the teeth of each rack member, a separate knob carrying each gear and adapted to rotate it, and means manually operated and when the lock is assembled adapted to be placed to effect disengagement of one of the rack members from engagement with its cooperating gear.

2. A lock comprising a frame, a bolt reciprocally mounted in the frame, a toothed rack member pivoted on each side of the belt, a gear meshing with the teeth of each rack 

